> Forgive me if this is a regularly asked question, but I have only been
> following this list for a few days.
> I have a '73 GT6 with a re-built engine. (approx. 450miles on it.)
> During the wet winter months here in the UK, I did a few odd jobs,
> including fitting a capillary oil gauge.
> Pressure readings are:-
> Cold..........45-50psi (I guess this is the relief valve opening.)
> Hot 2000rpm.......20psi.
> Hot idle ..............8-10psi
Hi Alan, welcome to the list.
I'm by no means a GT6 expert, but those numbers all seem a bit low to me ...
have you checked your oil gauge for accuracy? Those Bourdon-tube movements
definitely change calibration as they age, and even new ones are sometimes
inaccurate.
> The 'Hot 2000' reading seems a bit low; could that be because I fitted
> the gauge tapping after the rocker oil feed kit,
That means it's also after the filter, while usual practice (for reasons
I've never understood) is to put it before the filter. I'd probably try
changing the filter, just in case.
Also, the rocker oil feed kit does lower oil pressure, by adding a low
resistance flow path that bypasses the more important rod and main bearings.
This is just one of the reasons that many people (including me) don't like
them. You might try putting the plug back in temporarily, and see what
effect that has on oil pressure.
Was the oil pump replaced during the rebuild? Cam bearings? I'd also give
the oil pressure bypass valve the "hairy eyeball", remove and clean it if
it's not too hard to get to on a GT6. I've had them stick open on newly
rebuilt engines (not Triumphs tho).
Randall
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